Edge-trimmer.



A. F. WERTMAN.

EDGE TRIMMER.

APPLICATION FILED NOV. 24. ms.

1,,231,4@o PatentedJune 26, 1917.

WITNESSES INVEIV TOR ATTORNEYS fiMBRosE F WERTMHM, WM

AMBROSE F. WERTMA'N, OF HUMMELSTOWN, PENNSYLVANIA.

Application filed November 24, 1916.

To all whom it may concern:

Be it known that I, AMBROSE F. Wnnn MAN, a citizen of the United States,and a resident of Hummelstown, in the county of Dauphin and State ofPennsylvania, have invented a certain new anduseful Improve ment inEdge-Trimmers, of whichthe following is a specification.

My invention relates to improvements in edge trimmers, more especiallyin those devices which are used in trimming the edges of the soles ofshoes, and it consists in the combinations, constructions, andarrangements herein described and claimed.

An object of my invention is to provide a device by means of which theedge of a sole may be trimmed smoothly, that is to say,

will be trimmed without the undulations which the cutter usually makesdue to the vibration of the shaft on which the cutter is secured.

A further object of my invention is to provide a device which preventsthe vibration. of the shaft, thus enabling the cutter to make a smoothout which it otherwise would not make, and at the same time forms aprotecting guard which prevents the workman from receiving an injuryfrom the cutter during the operation of the latter.

A further object of my invention is to provide an attachment to theordinary edge trimming machine, which will accomplish the foregoingobjects and which may be applied in a few minutes.

Other objects and advantages will appear in the following specification,and the novel features of the invention will be particularly pointed outin the appended claims.

My invention is illustrated in the accom panying drawing forming part ofthis specification, in which:

Figure 1 is a face view of an edge trimmer embodying my improvedinvention, and

Fig. 2 is a longitudinal section, enlarged, along the line 2-2 of Fig.1.

In carrying out my invention I make use of certain parts of the ordinaryedge trimmer, these parts including a supporting base A, bearings B andC carried by the base, a' pulley D mounted on a shaft E. and a belt Ffor driving the pulley. As stated above these parts are ordinary. Thehearing B has an extension 6 and, as will be seen from Fig. 2, a cutterK is secured to the end of the shaft E at some distance beyond the endof the extension 6. The cutter Specification of Letters Patent.

EDGE-TRIMMER.

Patented June 26, 191 'Y.

Serial No. 133,136.

K forms no part of the present invention, except so far as it cooperateswith the novel features hereinafter described.

Secured to th end of the extension I) of the bearing B is a sleeve G,which surrounds the shaft E and which is provided with an enlargedportion 9 arranged to fit over the end of the'extension I), this portion9 being preferably split and being provided with ears g through which ascrew bolt 9 extends. The purpose of the screw bolt is to clamp thesleeve G securely to the end of the extension 6. I

Slidably disposed on the sleeve G is a second sleeve H, which is held tothe sleeve G by means of a set screw S. The position of the sleeve Hwith respect to the sleeve G may be varied by loosening the set screwand shifting the sleeve G to the desired position, and then tighteningup on the screw. As will be seen from the drawing the sleeve H isprovided with a flange h which extends over one edge of the cutter K.

From the foregoing description of the various parts of the device, theoperation thereof may be readily understood.

The edge of the sole of the shoe is held against the cutter in the spaceP between the edge of the flange h and a circular flange T on thopposite side of the cutter. The edge of the sole is run along thecutter in a well known manner, and the revolution of the cutter trimsthe edge.

Now the trouble with the edge trimmers heretofore was that the shaft Enear the cutter had no means of support so that the shaft would vibratelaterally of its axis, thereby making a series of ridges or undulationsin the edge of the sole, instead of making a smooth out. Moreover, theguard which kept the workman from being injured revolved with thecutter, and inasmuch as the guard had teeth which entered between theteeth of the cutter, many times a workman would be injured by therapidly moving guard itself.

In the present instance the sleeve G not only acts as a means forpreventing the vibration of the shaft, but as a support for a stationaryguard H. The workman can rest his hand directly against this guardwithout being in any danger of having his hand lacerated, since thisguard H does not revolve with the cutter. The result is that a workmanis able to finish a larger number of shoes in a given time than he iswhere he has to be more careful in the handling of the stock, for fearof injury. Owing to the smooth finish given the edge of the sole,subsequent operation such as the ironing of the edge may be omitted.This results in a further economy in making the shoe.

It is obvious that other means of at tachment of the sleeve G to thebearing extension b, as Well as other forms of supporting mechanism forthe shaft E, might be used Without departingin the least from the spiritand scope of the invention.

I claim 1. In an edge trimming device, a revoluble shaft, a cuttercarried by the shaft at one end thereof, a stationary bearing for saidshaft, having an extension, a sleeve secured to said extension forpreventing the vibration of the shaft in a direction at right angles toits axis, and a stationary guard or shield secured to said sleeve andhaving a portion extending over one edge of said cutter.

2. In an edge trimming device, a revoluble shaft, a cutter carried bythe shaft at one end thereof, a stationary bearing for said shaft,having an extension, a sleeve secured to said extension for preventingthe vibration of the shaft in a direction at right angles to its axis, astationary guard or shield secured to said sleeve and having a portionextending over one edge of said cutter, and means for adjusting theposition of said guard on said sleeve relatively to said cutter, and forsecuring it in its adjusted position.

3. In an edge trimming device, a support, bearings carried thereby, ashaft rotatably disposed in said bearings, one of said bearings havingan extension, a cutter carried by said shaft at one end thereof, meanssecured to said extension and arranged to engage said shaft forpreventing the vibration thereof in a direction at right angles to itsaxis, and a shield or guard rigidly secured to said means and arrangedto extend over a portion of the cutter.

4:. In an edge trimming device, a base or support, bearings carried bysaid base, one of said bearings being extended, a rotatable shaftdisposed in said bearings, a cutter carried at one end of said shaft, asleeve arranged to fit over said shaft and having an enlarged portionarranged to engage and to be secured to said bearing extension, and asecond sleeve fitting over said first'named sleeve and adjustablvsecured thereto, said second sleevehaving a flange arranged to extendover a portion of the cutter and to constitute a guard therefor.

AMBROSE F. WVERTMAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, I). (3.

